differ vs reproduce

differ

noun
  • A program that diffs, a diff. 

verb
  • Not to have the same traits or characteristics; to be unalike or distinct. 

  • To have diverging opinions, disagree. 

  • To be separated in quantity. 

reproduce

verb
  • To generate or propagate offspring or organisms sexually or asexually. 

  • To bring something to mind; to recall. 

  • To produce again; to recreate. 

  • To produce an image or copy of. 

How often have the words differ and reproduce occurred in a corpus of books? (source: Google Ngram Viewer )